Type-writing machine.



- No. 835,575. y PATENTBD Nov. 13, 1905.

' R. 11. STROTHER.

4TYPE WRITING MACHINE. APPLICATION FILED 5115.19, 1904.

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H15 TTCJRNEY No. 835,575. PATENTED NOV. 13, 1906.

R. H. STROTHER. TYPE WRITING MACHNB.

APPLICATION FILED 116.19. 1904.

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, H15 TTDRNEY.

No. 835,575. PATENTED NOV. I3, 1906.

R. H. STROTHER. TYPE WRITING MACHINE.

APPLICATION FILED AUG. 19, 1904.A

` 3 SHEETS-SHEET 3.

HIEATTDRNEY arrangement of the UNITED STA-rus VPATENT OFFICE.

ROBERT H. STROTl-IER, OF NEW.YORIA{, N. Y., ASSIGNOR TO UNIONTYPEWRITER. COMPANY, OE JERSEY CITY, NEW .JERSEYA OOR'- PORATION OF NEWJERSEY.

TYPE-WRITING. lvlAc'l-uNl-z.v

Specification of Letters Patent- Application filed August 19.1904.Serial. No. 221,407.

-io (all, whom, it may' concern.:

Be it known that I, ROBERT H. STROTHER, a citizen oi the UnitedStatles,` and a resident of the borough of Manhattan, city of New` York,in the county of Newr York and State of New York, have invented certainnew and useful Improvements in Type-Writing Machines, oi' which thefollowing is a specification. y

My invention relates to type-writing niachines, and more especially tothe type-action of such machines. p

My invention relates also to the case-shiftingI mechanism. ntype-Writing machines, and more especially in front-strike type-Writers,the typebars are usually arranged in a segment of a circle and saidtype-bars are actuated by a system of key-levers. The Width which' it isdesirable to give to the key-lever system is greater than that which itis desirable to give to the system of type-bars. Moreover, thekey-levers usually move up and .down in vertical planes', whereas thetype-.bars swing in pllanes at different inclinations to the vertica Theprincipal object of my. invention is to so connect a system of type-barswith a systemo'r` key-levers of greater Width than said system oftype-bars as thatall of the parts shall be operated by direct pulls orpushes a plied substantially in the planes in which t e pivoted elementsswing, and therefore Without torsional stra-in.

One embodiment of my'invention is illustrated in the accompanyingdrawings, in Which i v Figure 1 is a-ront to rear vertical section ofatype-Writingmachine. Fig.'2 is a transverse vertical section of thesame, taken substantially on thc'line :up: if-Fig. 1 and looking towardthe back of the machine; and Fig. 3 is a diagrammatical lllanviewshowing the` type-bar system, and the system of connectin devices. Mhave shown `my invention applied to a front-strike type-writer" the mainframe of Y which comprises a base portion 1,- l'r'om which rise posts 2,Whichsupport a top plate 3. on

' which is mounted a carriage having a platen 4. series of type-bars 5are pivotallyy l mounted on a segment 6, and the free ends of l 2, andsaid hangersare mounted one on each ey-lever system, the

segmental type-rest 7, which issupported by arms 8, connected with thetype-bar segment. t

The type-bars are mounted to. swing up'- ward and'backward to cause thetypes to strike against the front face of the platen. The' precisemanner in which said type-bars are mounted on the'segme'nt is immaterialto my invention. As shown in the present case, ,said 'type-bars arepivoted on a pivot rod or wire 9, which lies in a slot in the segment 6,'and each of said type-bars is guided by a transverse slot 10 in saidsegment. Each of the type-bars has an arm v11,- to which an'operatin-link 12 is pivoted at 13. In ont-strike machines, the operatinglinksare connected to the 'type-bars, sometimes above an'd sometimes belowthe pivots g' of the' latter, and said links extend toward the iront ofthe machine'in'sonie instances, and inotherinstances they extend.ltoward vthe backoi the machine. Moreover, said links 'are sometimespull-links and sometimes ,push-links. For the purpose of illustratingvthe principle 'oi my -invention I have deemed 1t sufficient to show itapplied to one of. these arrangements. In the machinev shown in thedrawings the links 12 are pull-links connected to the typebars above thepivots of the latter, and. they extend toward the back oi' the machine.

`the upwardly-extending arm of a bell-crank sublever 15.which islivotally mounted in tending arm which is connected by a link 17 4with akey-lever 18. As shown in the present case, the key-levers consist oflevers ex- .tending from the keyboardtoward the back of the machine andhaving keys 19 ion-their front-ends and pivoted at their rear endson astationary 'rod -20.- So far as ymy invention is concerned, however,these key-levers might have other forms. For example, they might havethe form oi? rock-shafts rovided'with arms, such as are used in the mithPremier type-Writer, l

he hangers 16 are rigidly mounted on a iixed segment 21, which issecured by screws 22 to the base portion 1 of the main Vframe.

Said segment 21 is stepped, as sliown in Fig.

said type-bars normally rest in a basket or Said link is pivoted at itsother end at 14 .tol

a hanger 16 and which as a horizontally-exste To this end each of saidhangers has a re uced ortion 23, Fig. 1, which yextends into a ho ewhich opens on the upper surface of'each step. The hangers are securedin position by set-screws 24, which are threaded into the segment andwhich engage said reduced portion 23 of the hangers. 'The segment 2I isof greater radius than the typebar segment 6 and stands lower in themachine than said segment. The links 12 lie substantially alongelementsoi` the frustum of a cone, the axis of which passes through thecenter of the type-bar segment. In Figs. 1 and 3 the lines a representtwo of the elements of said cone, the 'line b represents the axis ofsaid cone, and the point C is theapex of the cone. The bell-cranksublevers 15 swing in vertical planes which intersect in a verticallinet'hrough the oint C. y

As' will be understood y reference to Fig. 3, the parts are so designedthat each of the links 17 is vertically disposed, its point ofconnection with the sublever 15 standing vertically over its key-lever.kEach of the links 17 therefore lies in the lane in which its keylevermoves, and it a so lies in the vertical plane in which its subleverswings. In other words, this link lies substantiall along the line ofintersection of the plane of t 1e keylever and the lane of thesublever.By an inspection of ig. 3 it vwill be seen that each of the links12li'es in the plane of its sublever, and by an inspection of Fig. 2 itwill be seen that each of saidlinks lies also in the plane oi itstype-bar-that is to say, in theplanein which'the arm 11 of said type-barswings. It will be perceived, therefore, that each of the links 12 liessubstantiall in theline of intersection o the plane of its sublever withthe i? memberswings.

with two types 25.

For' someof the purposes of my invention it lis not necessary that thesublevers should be inv theinature ofy bellcrank levers, butl other oplating devices might be substituted 'for sai' bellfcranks withoutdepartingi'rom my invention.

`- Ixprefer to mounta plurality'of types 'on ea'cht e-bar, and in thepresent case I have accor ingly shown each type-bar e uipped p '.It isobvious that4 the Vplatenvmay be shifted to cause one or the other ofthese types to print; but I prefer to shift the ty eebar segment forthis urpose.

It will beo vious that if'the case-s t motion of said segmentconsistedof a rectilinear vertical motion thensucha motion would re-m sun in apun on' each ofthe links 12 .qnd a Kpartial'operation of all of thetype-bars. I

headed and shouldered screws 28, which passk through said arms and arethreaded into the ends of the brackets 26. The common axis of vthesepivot-screws' passes substantially through the pointsl, at which the twoend links 12 are pivoted to the end type-bars oi 'the system. The arms27 are rigidly mountl ed on or are formed integral with a rockshaft 28,which is ivoted at its ends on cone i pivot-screws 29, w ich arethreaded through brackets 30, which depend from the top plate 3. In thepresent instance the axis of oscilf lation of the shaft 28 passesthrough the pivot-pointsl 14 ofthe two links 12, which are at the endsof the series. In order-to avoid interference. of said rock-shaft withthese links and their sublevers, the rock-shaft is bent, as shown in Fis. 1 and 2. Ari-arm 31 projects from the roc -shaft 28 toward the backof the machine and is connected by a link 32, Fig. 1, with acase-shift-key lever 38, Fig. 2. In the. present instance I have showntwo case-shift-key levers-vone on each side of the machine. ifa'case-shiit key be depressed. the shaft528 will be rocked and the arms27 will be ele vated, thus raising the t e-barsegment- The parts beingconstructe as described,it is obvious that each of the end links 12ofthe series will swing about itspoint of connection'with its subleveras a pivot. In order to guide the segment in such a manner thatV theremaining linkswill also operate in the same manner, a link 34 is ivotedat its forward endin ears 35, depen ing from the middle of the type-barsegment, and said link extends downward'and backward and is pivoted atits rear end in a han er 36, which is secured by a set-screw 37 to tIisimilar to that in which the hangers 16 are secured to said segment.This link guides the lower middle portion of the type-bar segment insuch a manner that said segment swin sin case-shifting, as indicated bydotted lines in Fig. 1, so that the lower links 12 move about theirends-14 as pivots. When the arts are swung in this manner, the intermeiate links will'also's'wing about their ends 14as pivots, so that whenthe segment is shifted no pull will be imposed upon any of the links bvsuch shifting motion.

The shifting motion of thel type-bar seglaent is adjusapiy limitar in.both daaraan@ e segment 21 in a manner IDO The construction issueh thatl'io .byLettersPatenn is 1. In a front-strike type-writing machine;

by seti-screws 38, which are threaded through .brackets 39,- which aresecured. to the top plate 3. 'Each of thescrew'sI 38 is provided with alock-nut 40.

Itis-not essential for some of the purposes ofmvention that all of thelinks 12 .shall` lie'in the surface of a right cone; but some of' -theadvantages or said inventionfare secured by arrangements of saidlink's,`which may be described in general terms as conical arrangements,but in which'said links are not elements of a frustumof a right cone.

' What I. claim v*as new, and de sirefto secure the combination'of asegmentally-arranged series of front-strike type-bars; aconicallyarranged series 'of operating-links connected to saidtype-bars; a series of sublevers mounted to Swingin non-parallel planesand connected to said links ;and a series of vertically--movablekey-levers connected with said sub- .levers A 2. In afront-strike type-writing machine,

Athe combination of a segmentally-'arran'ged 'series of front-striketype-bars; a segmenton Which said type-bars: are pivotally mounted r aconically-arranged 'series of links -con'" nected with said type-bars; aseries' of sub-A levers mounted to swing in convergin ver-' tical planesand connected with said inks;

and'4 a series of key-levers connected withl said series of sublever's.Y 3. In a front-strike type-Writing machine, the combination of Aaseries of key-levers; a

.segmentally-arranged series of front-strike mf bars; aconically-arranged Aseries of connected at one endwith said typebars; aseries of bell-crank sublevers having upwardly-extending arms to whichsaid links are connected at. the other ends'there'of and ha O'horizontally extendingarms coninec'te with said ke -levers 4.5111 arontestri e type-Writingmachine', the combination of a series ofkey-levers; "a series of subleversfmounted to swing in con'- vergingvez-tical planes saidsublevers' have.

lng horizontally-disposed arms 'which aresaid ks; anda case-shiftmechanism-arrangedto shiftl said type-bars.

6. In a-front-strike typefwriting machine, the combina-tion of -a seriesof front-strike typebarseach carrying a plurality of types; f 'a segmenton which said type-bars are piv- "otallyfmounted5aseriesfofsublevcrs-mountplane of its' -with sald subleve'rs.

12. In a front-strike 'type-writing malv ed on a segment-ofgreater-radius than said typefbar segment; a series of links connect#`ing said type-bars and sublevers; a series of keys 'connected with:said gsublcvers; and

means for imparting a .case-shift motion t'o saidtype-bar segment. e

7. In a type-writing machine, the combination of a series of type-barseachcarrying a plurality of types; a segment on which 'said type-barsare pivotallyjmounted; a series of actuating devices for said type-bars;a conically-arranged series of links' connecting said actuating deviceswith. saidtype-bars means for shifting said type-bai", segment; andmeans for guiding the shiftinmotion.' of

said segment so that each link turns'about'its point of connection. withlits actuating'- devicefas a center. Q 8. In a type-writing machine, thecombination of a series of typebars each carrying a plurality of types;a segment on whichjsaid type-bars are pivotallyv mounted; a series ofkey-levers, wider ,than said seriesfof'type#. bars; a series ofsublev'ers connected'with said key-levers; aconicall -arranged seriesofvlink's connecting saidjsu "levers withsaidkey-levers; a rock-shafthaving 'arms con nected with the said segment near theends'v thereof alink for guiding the middle of.- said segment;l and al casesshift keyfor'shiting said segment.A

9. In a type-writing machine, the combi-' nation of asegmentally-arrangedseries of type-bars pivoted to swing in planes' atdiffer-5l ent inclinations to the vertical; a conicallyarranged series of' links vconnected with-said type-bars; a serles of sublevers connectedwith said links, each su-blever havin a hori-"g zontal vot and swingingsubstantia lyin the vertica plane of its link; and a series of key-'levers connected'with said sublevers.

10. In a type-writin machine, the combi# nation "of, asegmentaIly-arranged seriesy of front-strike type-'bars'g-aconically-arranged series of links connected to vsaid type-bars,

each link lying substantially' in the plane of :its type-bar; asevmentally-arranged vseries evers, each having a horizontal pivot' ofsub vand swin substantially` in. the vertical gmnk; and-a series ofverticall movable key-levers' connected Withsai'dsub levers. 11. In atype-writing machine'the combination of a series of type-bars pivoted toswing in planes that intersectin'la line; a series of links. connectings aid sublevers and said Vt e bars; and key -levers connected chine, thecombination of a series of frontloo ibs c IIQ,

strike 4type-bars; a conically-arranged series Ao links connectedwithsaid type-bars; a se- I zo i ries of subleversfpivoted toswing Ainplanes that intersect ina line at right angles to the first-mentionedline; a conically-arranged se- IOA sublevers.

n ally-arranged series of links connected with each sublever ivoted toswing substantially in the verticalp plane of its link; a series ofkey-levers; and a series of substantially vertical links connecting saidkeylevers to said 13. In a'type-writing machine, the combination of aseries oi type-bars.; a segment on which said type-bars are mounted; aconically-arranged series of links connected to said type-bars; a seriesof operating devices connected to said links; means Jfor imparting'tosaid type-bar segment a case-shift motion in a direction across the axisof said segment; and means for guiding the motion of said segment sothat the links turn about their points of' connection with saidoperating devices as centers.

14. In a front-strike type-writing machine, the combination of a seriesof frontstrike type-bars; a segment on which said typeebars `arepivotally mounted; a conicsaid type-bars; a series of subleversconnected to said links; a rock-shaft having arms pivoted to saidtype-bar segment; a link connected to said type-bar segment and meansfor imparting a case-shift motion to said segment, said arms and linkbeing so disposed as to guide the motion of said seg- 'ment to causecach of said links to swing about its point of connection with itssublever as a center.

15. In a front-strike type-Writing in achine, the combination of atype-bar seg- Vries of sublevers connected with said links, to astationary part of the framework; and

ment, a series of front-strike type-bars pivotally mounted on saidsegment, a series of bell-cranksublevers each pivoted to swing in avertical plane and eachhaving a vertical arm andv a horizontal arm,links connecting the vertical arms of said sublevers with saidtype-bars, a series of key-levers, and links connecting saidkey-leverswith the horizontal arms of said sublevers.

l Y Signed at the borough of Manhattan, city of New York, in the countyof New York and State of New York, this 18th day of August, A. D. 1904.

ROBERT H. STROTHER.

Witnesses:

.CHARLES E. SMITH, E. M. WELLS.

